621045340644365 has 32 divisors (see below), whose sum is σ = 917258737731840. Its totient is φ = 393091565612544.

The previous prime is 621045340644353. The next prime is 621045340644383. The reversal of 621045340644365 is 563446043540126.

It is a cyclic number.

It is not a de Polignac number, because 621045340644365 - 2⁶ = 621045340644301 is a prime.

It is a super-2 number, since 2×621045340644365² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1784057 + ... + 35288433.

It is an arithmetic number, because the mean of its divisors is an integer number (28664335554120).

Almost surely, 2^{621045340644365} is an apocalyptic number.

621045340644365 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

621045340644365 is a deficient number, since it is larger than the sum of its proper divisors (296213397087475).

621045340644365 is a wasteful number, since it uses less digits than its factorization.

621045340644365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33545141.

The product of its (nonzero) digits is 24883200, while the sum is 53.

The spelling of 621045340644365 in words is "six hundred twenty-one trillion, forty-five billion, three hundred forty million, six hundred forty-four thousand, three hundred sixty-five".